Supply Chain Learning and Spillovers in Vendor Managed Inventory

Despite extensive literature on the value of supply chain collaboration programs, little research has examined the issue from the perspective of organizational learning. Using a unique, operational level dataset, we empirically examine the learning curves through which performance improvements are realized under vendor managed inventory (VMI). Performance is measured at the downstream distributor locations by examining inventory levels after controlling for customer service performance (stockouts). We identify and assess three sources of learning: a supply chain dyad's self‐learning, learning spillovers from electronic data interchange (EDI), and learning spillovers from other supply chain dyads. We find that self‐learning, learning spillovers from EDI, and learning spillovers from other supply chain dyads, all have positive and significant impacts on a distributor's inventory performance. In addition, we find that self‐learning may exhibit a U‐shaped learning curve (i.e., performance first improves and then plateaus or declines). These findings suggest that the various learning experiences with VMI and EDI can lead to improved performance over time, but the path to improvement may be complex.     

流程再造方法论

大型企业的竞争日趋白热化,已经成为了整体实力的全面竞争,既包括好的产品也包括优化的供应链,而这一切都需要合适的流程来保证。本文对很多公司热衷于流程再造花了很多力气却达不到理想的效果出发,通过对一些全球领先企业的流程进行了研究提出了流程再造本身也得要有流程并上升为方法论。     

Linking inventory efficiency,productivity and responsiveness to retail firm outperformance: empirical insights from US retailing segments

This paper establishes an empirical model linking a retail firm’s inventory management effectiveness to superior competitive operational performance for specific product-line retail segments. Using 16?years of US retail firm financial data from the COMPUSTAT Fundamentals database across 12 distinct competitive retailing segments, we develop and test a time-series model that links several inventory management execution measures to the competitive operational outperformance of retail firms. The analysis presented provides strong evidence that measures of inventory management performance are not ‘one size fits all’ for the retail industry, and helps to explain why extant research has had difficulty linking inventory control policy effectiveness to operational performance advantages in retailing. We discuss the implications of these empirical findings on the study of inventory policy execution, and offer some guidance for further research.     

Realizing Benefits from Enterprise Resource Planning: Does Strategic Focus Matter?

A key driver of the recent wave of enterprise resource planning (ERP) implementations was the assumption that the integration of business information would provide firms with a competitive advantage, yet concrete business benefits have been uneven across adopting firms. A possible explanation is that although the resource‐based view holds that competitive advantage is derived from inimitable resources, ERP software has become a commodity. Socio‐technical theory suggests that internal organizational resources based on a foundation of ERP technology may be the true drivers of ERP benefits. A firm's strategic configuration is posited to influence the portfolio of organizational competencies available to leverage the benefits of integrated business information, and a number of hypotheses are developed based on the notion that firms with different strategic objectives will realize different operational benefits from the adoption of ERP systems. Survey data from North American manufacturing firms that have implemented ERP systems demonstrate that ERP adopters seeking operational performance improvements are likely to realize these benefits. On the other hand, those seeking external market and supply chain performance improvements must first establish a foundation of internal operational performance improvements before customer satisfaction and supply chain benefits can be realized.     

Portfolio Interrelationships and Financial Performance in the Context of European Firms

The linkage between the interrelationships of a firm’s lines of business and corporate financial performance has been the subject of extensive research in the strategy field. Yet very little research has examined this key relationship within firms operating in Continental Europe. This study investigates firm relatedness and its further relationship to accounting and market-based performance measures within a sample of European firms. The results confirm a positive and significant relationship between resource-based relatedness and firm performance for German, Swiss and Austrian multi-business firms. Thus, this study provides further evidence that resource-based relatedness of large diversified manufacturing companies can help explain variability in corporate financial performance across different institutional environments.     

The Role of Interorganizational and Organizational Factors on the Decision Mode for Adoption of Interorganizational Systems*

The dramatic growth of interorganizational systems (IOS) has changed the way organizations conduct their business, and has resulted in significant tangible and intangible benefits being realized by participating firms. However, the implementation of these IOS requires the cooperation and commitment of all the participating members. These members may have complex economic and business relationships among themselves that can result in a number of social, political, and economic factors influencing the adoption and implementation of IOS. This study examines the role of interorganizational and organizational factors on the decision mode for adoption of IOS, in the specific context of electronic data interchange (EDI). Four interorganizational factors, based on the socio-political framework derived from research in marketing, and five organizational factors based on research in IS were used in the study. The data for the study were collected through a large scale field survey. Two respondents, the sales/purchase manager and the IS manager, from 201 firms responded to the survey. The results of discriminant analysis of the data reveal that two interorganizational variables, competitive pressure and exercised power, and two organizational variables, internal need and top management support, are important variables to differentiate firms with proactive decision mode from firms with reactive decision mode. The study also evaluates the differences between proactive and reactive firms on three implementation outcomes. Proactive firms are found to have greater extent of adaptation, more external connectivity with trading partners, and better integration of EDI information in their internal IS applications.     

两级商业信用下存在顾客预付的易腐品库存模型

在销售单一品种的易腐品供应链中,假设销售商在获得供应链上游供应商延时还款的同时,也从（供应链）下游顾客处获得了部分预付款。分三种情况分别讨论销售商的成本构成,并由此建立数学模型以求解最优订货周期使得销售商单位时间总成本最小化。通过数学证明得到了目标函数的解析性质,结果显示每种情况下在可行域范围内至多存在一个极小值点。以此为基础给出了相应的命题以有效地确定销售商的最优决策。最后结合运作管理实践,通过数值算例说明了模型的有效性。     

基于Petri网的工作流优化分析

工作流管理技术是实现企业业务过程重组、过程管理与过程自动化的核心技术。在工作流参考模型中,工作流验证和优化是过程定义工具的重要组成部分。在综述相关研究论文和经典Petri网理论的基础上,提出了基于Petri网的工作流合理性验证算法和过程优化算法。最后通过保险索赔过程的优化实例,验证了工作流优化算法的有效性。     

Inventory‐Based Dynamic Pricing with Costly Price Adjustment

We study an average‐cost stochastic inventory control problem in which the firm can replenish inventory and adjust the price at anytime. We establish the optimality to change the price from low to high in each replenishment cycle as inventory is depleted. With costly price adjustment, scale economies of inventory replenishment are reflected in the cycle time instead of lot size—An increased fixed ordering cost leads to an extended replenishment cycle but does not necessarily increase the order quantity. A reduced marginal cost of ordering calls for an increased order quantity, as well as speeding up product selling within a cycle. We derive useful properties of the profit function that allows for reducing computational complexity of the problem. For systems requiring short replenishment cycles, the optimal solution can be easily computed by applying these properties. For systems requiring long replenishment cycles, we further consider a relaxed problem that is computational tractable. Under this relaxation, the sum of fixed ordering cost and price adjustment cost is equal to (greater than, less than) the total inventory holding cost within a replenishment cycle when the inventory holding cost is linear (convex, concave) in the stock level. Moreover, under the optimal solution, the time‐average profit is the same across all price segments when the inventory holding cost is accounted properly. Through a numerical study, we demonstrate that inventory‐based dynamic pricing can lead to significant profit improvement compared with static pricing and limited price adjustment can yield a benefit that is close to unlimited price adjustment. To be able to enjoy the benefit of dynamic pricing, however, it is important to appropriately choose inventory levels at which the price is revised.     

The Impact of E‐Replenishment Strategy on Make‐to‐Order Supply Chain Performance

This research investigates the impact of electronic replenishment strategy on the operational activities and performance of a two‐stage make‐to‐order supply chain. We develop simulation‐based rolling schedule procedures that link the replenishment processes of the channel members and apply them in an experimental analysis to study manual, semi‐automated, and fully automated e‐replenishment strategies in decentralized and coordinated decision‐making supply chain structures. The average operational cost reductions for moving from a manual‐based system to a fully automated system are 19.6, 29.5, and 12.5%, respectively, for traditional decentralized, decentralized with information sharing, and coordinated supply chain structures. The savings are neither equally distributed among participants, nor consistent across supply chain structures. As expected, for the fully coordinated system, total costs monotonically decrease with higher levels of automation. However, for the two decentralized structures, under which most firms operate today, counter‐intuitive findings reveal that the unilateral application of e‐procurement technology by the buyer may lower his purchasing costs, but increase the seller's and system's costs. The exact nature of the relationship is determined by the channel's operational flexibility. Broader results indicate that while the potential economic benefit of e‐replenishment in a decentralized system is substantial, greater operational improvements maybe possible through supply chain coordination.     

The Impact of the Online Channel on Retailers' Performances: An Empirical Evaluation

The use of the Internet as an additional sales channel offers traditional retailers opportunities to reach expanded markets while improving the efficiency of their operations. Although the potential benefits of the online channel are clear, there are significant variations in the scope and depth of online channel use among retailers. Drawing from data on more than 100 publicly traded companies, this study examines the impact of online‐channel use on retailers’ performance. The results suggest that the online channel provides significant improvements in sales, cost, inventory, and return on investments. In addition, we find that the timing of online‐channel adoption does not play a significant role in performance improvement, but having a local store presence does.     

CAMPBELL SOUP'S CONTINUOUS REPLENISHMENT PROGRAM: EVALUATION AND ENHANCED INVENTORY DECISION RULES

Campbell Soup's continuous replenishment (CR) program is a novel innovation designed to improve the efficiency of inventory management throughout the supply chain. With CR (1) retailers pay a constant wholesale price but continue to participate in consumer promotions, (2) retailers transmit to the supplier daily inventory information via electronic data interchange (EDI), and (3) the supplier assumes responsibility for managing retailer inventories, i.e., vendor managed inventories (VMI). We develop simple inventory management rules to operate CR, and we test these rules with a simulation using actual demand data provided by Campbell Soup. On this sample we find that retailer inventories were reduced on average by 66% while maintaining or increasing average fill rates. This improvementreduces a retailer's cost of goods sold by 1.2%, which is significant in the low profitmargin grocery industry. Furthermore, these savings could have been achieved without VMI.     

Emergency inventory ordering assuming Poisson demands

Abstract

Most business and industrial firms use some procedure for emergency ordering. If independent demand for low-volume, high-cost items is Poisson distributed, subsequent analyses reveal that emergency ordering may be less expensive than carrying extra safety stock. Emergency ordering reduces the out-of-stock cost as well as the required safety stock. Total cost is sensitive to the lead time required for emergency orders. The results are particularly applicable to maintenance inventory. Under the assumptions of this study, the conclusion may be drawn that an emergency ordering system may approach the theoretical minimum for operating an inventory system.     

A review of RFID technology and its managerial applications in different industries

Radio frequency identification (RFID) is an emerging technology that is increasingly being used in supply chain management. RFID technology plays an important role in supporting logistics and supply chain processes because of their ability to identify, trace and track information throughout the supply chain. The technology can provide suppliers, manufacturers, distributors and retailers precise real time information about the products. This accurate knowledge of the inventory would result in lower labor cost, simplified business processes and improved supply chain efficiency. If properly used, it has the potential to cut ordering lead time and cost on inventory control, increase the accuracy of inventory information, help avoid stockouts and boost the number of inventory turns. In this paper, we provide an overview of the current state of RFID applications in different industries and its impact on business operations. We provide extensive literature survey and develop a framework for future research areas in this field.     

库存成本变化的VMI供应链协调

提出了库存成本变化的经济订货批量(EOQ)模型，基于该模型研究了库存成本变化时供应商管理库存(VMI)系统的最优协议问题。在该系统中，订货商和供应商达成缺货成本共担协议：当缺货发生时，供应商需要向订货商支付缺货补偿。订货商和供应商分散决策，订货商通过设计协议来减少其成本，而供应商通过制定补货决策来缩小自身成本。通过与传统系统和整合系统的比较，得出了库存成本变化时VMI系统的最优补货决策和缺货成本共担协议。采用数值算例验证了分析结果。结果表明，当且仅当供应商预期成本等于整合系统的最小总成本与固定缺货罚金之和时，VMI系统与整合系统具有相同的补货决策和系统绩效，即能够实现供应链协调。     

Modelling the effects of institutional support and international knowledge on competitive capabilities and international performance: Evidence from an emerging economy

This paper explores the process through which institutional support initiatives contribute to the international performance of firms from the small open economy of Malaysia. We examine both direct and indirect causal effects of institutional support (informational, training, trade mobility and financial aid-related support) on internationalization. We develop a model to address how institutional support initiatives affect the performance of export-oriented or so-called born global firms. From a survey of 250 firms from Malaysia, an emerging Southeast Asian market, we find that government support initiatives do not have significant impacts on firm performance unless examined based on processes of government support initiatives, international knowledge, commitment, competitive capabilities, and international performance. Government support initiatives play a critical role in export-oriented firms from small open economies (SMOPECs) in emerging markets by contributing to a number of contextual deficits that determine the international performance of a firm. This study provides guidelines for policy makers and business owners on how institutional support can facilitate the accumulation of knowledge about international markets, enhance commitment to exports and help firms gain competitive capabilities in the export market for greater success in international markets.     

Contracting Under Vendor Managed Inventory Systems Using Holding Cost Subsidies

Vendor managed inventory systems are becoming increasingly popular. An important issue in implementing a vendor managed inventory scheme is the contracting terms that dictate the ownership of the inventory and the responsibility of inventory replenishment decisions. Thus the performance of a vendor managed system crucially depends on these terms and on how inventory‐related costs are shared in a supply chain. We consider a system where a manufacturer supplies a single product to a retailer who faces random demand in a competitive market. The retailer incurs a fixed cost per order, inventory holding cost, and a penalty cost for a stockout (unsatisfied demand is back‐ordered). Further, the manufacturer incurs a penalty cost when there is a stockout at the retailer and a fixed replenishment cost. We assume that the players are rational and act noncooperatively. We compare the performance of retailer managed inventory systems, where the retailer places orders and makes replenishment decisions, with vendor managed inventory systems, wherein the vendor or manufacturer makes inventory and replenishment decisions. Specifically, in the vendor managed inventory system, we propose and evaluate holding cost subsidy‐type contracts on inventories offered by the retailer to improve system performance. We evaluate this contract in the context of three widely used inventory systems—deterministic economic order quantity, continuous review (Q, r) policies, and periodic review policies—and show when such contracts may improve channel performance.     

DRIVERS OF INTERNET PURCHASING SUCCESS

The development of the Internet as a business tool over the past 5 years has been phenomenal, causing a period of chaos and creative destruction. E‐commerce has been hyped as a catalyst for vast streamlining of the supply chain. Yet, in a time of such phenomenal change, the focus tends to be on the large picture. Many details of how a new technology should be or is employed tend to be unknown or ignored. However, as the technology matures and stabilizes, one of the primary factors that separate winners from losers is the way in which the technology is implemented and operated on a daily basis. This study examines the ways in which companies utilize the Internet to streamline their purchasing process. A survey of 416 customers of a major Internet retailer of commodity office supplies reveals important relationships between web site design, employee work environments, Internet strategy, and purchasing performance. Our sample of companies consists of firms that have ordered office supplies at least once using the Internet. Our data indicate that companies do realize performance benefits from utilizing the Internet as a purchasing tool. Furthermore, the data suggest factors that facilitate purchasing process improvements. These factors can be utilized by both buying and selling companies to improve their proprietary processes to maximize the benefits of e‐commerce as a purchasing tool.     

Sustaining the Buyout Governance Model: Inside Secondary Management Buyout Boards

This paper examines the impact of private equity (PE) directors and their human capital on operating performance in a unique hand‐collected sample of 200 secondary management buyouts (SMBOs) during 2000–2015. It shows that PE directors’ human capital tends to play a statistically and economically important role in performance. Financial (rather than operational) experience of PE directors in acquiring PE firms tends to have a substantial impact on post‐SMBO profitability, while high‐level business education is especially important in post‐SMBO growth performance enhancement. Complementary expertise, provided by directors in buying and selling PE firms, plays an important role only in post‐SMBO growth improvements. Overall, the paper's results provide evidence that governance benefits of the buyout model tend not to be exhausted in the primary buyout stage, but the effects in the secondary buyout phase depend on the nature of PE directors’ human capital resource, notably in respect of the balance between board monitoring and advisory roles. This study therefore adds to growing evidence on how the ownership and life‐cycle nature of firms affect sustainability of boards fulfilling their roles. The results are robust to sample selection bias, different types of PE firms and different measures of human capital.     

RFID‐Enabled Visibility and Retail Inventory Record Inaccuracy: Experiments in the Field

Accurate inventory records are key to effective store execution, affecting forecasting, ordering, and replenishment. Prior empirical research, however, shows that retailer inventory records are inherently inaccurate. Radio Frequency Identification (RFID) enables visibility into the movement of inventories in the supply chain. Using two different field experiments, the current research investigates the effectiveness of this visibility in reducing retail store inventory record inaccuracy (IRI). Study 1 used an interrupted time‐series design and involved daily physical counts of all products in one category in 13 stores (8 treatments and 5 controls) of a major global retailer over 23 weeks. Results indicate a significant decrease in IRI of approximately 26% due to RFID‐enabled visibility. Using an untreated control group design with pre‐test and post‐test, Study 2 expands the number of categories to five and the number of stores to 62 (31 treatment and 31 control stores). Results show that the effectiveness of RFID in reducing IRI varies by category (ranging from no statistically significant improvement to 81%). Results also suggest that RFID ameliorates the effects of known determinants of IRI and provide the key insight that the technology is most effective for product categories characterized by these determinants.